xref: /aosp_15_r20/external/llvm/test/CodeGen/X86/optimize-max-2.ll (revision 9880d6810fe72a1726cb53787c6711e909410d58)
1*9880d681SAndroid Build Coastguard Worker; RUN: llc < %s -march=x86-64 | grep cmov | count 2
2*9880d681SAndroid Build Coastguard Worker; RUN: llc < %s -march=x86-64 | FileCheck %s
3*9880d681SAndroid Build Coastguard Worker
4*9880d681SAndroid Build Coastguard Worker; CHECK: jne
5*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: jne
6*9880d681SAndroid Build Coastguard Worker
7*9880d681SAndroid Build Coastguard Worker; LSR's OptimizeMax function shouldn't try to eliminate this max, because
8*9880d681SAndroid Build Coastguard Worker; it has three operands.
9*9880d681SAndroid Build Coastguard Worker
10*9880d681SAndroid Build Coastguard Workertarget datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
11*9880d681SAndroid Build Coastguard Worker
12*9880d681SAndroid Build Coastguard Workerdefine void @foo(double* nocapture %p, i64 %x, i64 %y) nounwind {
13*9880d681SAndroid Build Coastguard Workerentry:
14*9880d681SAndroid Build Coastguard Worker	%tmp = icmp eq i64 %y, 0		; <i1> [#uses=1]
15*9880d681SAndroid Build Coastguard Worker	%umax = select i1 %tmp, i64 1, i64 %y		; <i64> [#uses=2]
16*9880d681SAndroid Build Coastguard Worker	%tmp8 = icmp ugt i64 %umax, %x		; <i1> [#uses=1]
17*9880d681SAndroid Build Coastguard Worker	%umax9 = select i1 %tmp8, i64 %umax, i64 %x		; <i64> [#uses=1]
18*9880d681SAndroid Build Coastguard Worker	br label %bb4
19*9880d681SAndroid Build Coastguard Worker
20*9880d681SAndroid Build Coastguard Workerbb4:		; preds = %bb4, %entry
21*9880d681SAndroid Build Coastguard Worker	%i.07 = phi i64 [ 0, %entry ], [ %2, %bb4 ]		; <i64> [#uses=2]
22*9880d681SAndroid Build Coastguard Worker	%scevgep = getelementptr double, double* %p, i64 %i.07		; <double*> [#uses=2]
23*9880d681SAndroid Build Coastguard Worker	%0 = load double, double* %scevgep, align 8		; <double> [#uses=1]
24*9880d681SAndroid Build Coastguard Worker	%1 = fmul double %0, 2.000000e+00		; <double> [#uses=1]
25*9880d681SAndroid Build Coastguard Worker	store double %1, double* %scevgep, align 8
26*9880d681SAndroid Build Coastguard Worker	%2 = add i64 %i.07, 1		; <i64> [#uses=2]
27*9880d681SAndroid Build Coastguard Worker	%exitcond = icmp eq i64 %2, %umax9		; <i1> [#uses=1]
28*9880d681SAndroid Build Coastguard Worker	br i1 %exitcond, label %return, label %bb4
29*9880d681SAndroid Build Coastguard Worker
30*9880d681SAndroid Build Coastguard Workerreturn:		; preds = %bb4
31*9880d681SAndroid Build Coastguard Worker	ret void
32*9880d681SAndroid Build Coastguard Worker}
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